This is a point feature class that defines the center point for each Connecticut 1951-1952 aerial photograph. There are 2,023 total aerial photograph center points in this feature class. Of them, 1,027 represent photographs taken at a scale of 1:8000 and the remaining 966 of which represent photographs taken at a scale of 1:20000. Each center point for a photograph taken at a scale of 1:20000 represents a photograph covering 2.84 miles east-west by 2.84 miles north-south, covering a geographic area of approximately 8.1 square miles. Center points for photographs at a 1:8000 scale. Original prints of each photo were 9 7/8" x 9 7/8", with an image size of 9" x 9". 1:20000 aerial photographs overlap by approximately 1.6 miles, and 1:8000 aerial photographs overlap by approximately .93 miles. The photographs represented by each center point were originally taken by Robinson Aerial Surveys, Inc., for the U.S. Department of Agriculture, Agriculture Stabilization and Marketing Service between October 1951 and June 1952.

Purpose:

This data serves as a center point index for the set of 1951-1952 aerial photos for Connecticut. Links to digital historical aerial photography and associated metadata can be found in the GIS database.

Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: unknown

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.716819

East_Bounding_Coordinate: -71.795879

North_Bounding_Coordinate: 42.060000

South_Bounding_Coordinate: 40.973072

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: location

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: historical aerial photography

Theme_Keyword: aerial photography

Theme_Keyword: photograph

Theme_Keyword: imagery

Theme_Keyword: center point

Theme_Keyword: centroid

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, DC, National Institute of Standards and Technology.

Place_Keyword: Connecticut

Place_Keyword: CT

Place_Keyword: Massachusetts

Place_Keyword: MA

Place_Keyword: New York

Place_Keyword: NY

Place_Keyword: Rhode Island

Place_Keyword: RI

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Place_Keyword: US

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 1951

Temporal_Keyword: 1952

Access_Constraints:

None, this data is in the public domain and may be redistributed.

Use_Constraints:

No restrictions or legal prerequisites for using the data. Although this data set has been used by the University of Connecticut Libraries, Map and Geographic Information Center - MAGIC, no warranty, expressed or implied, is made by the University of Connecticut Libraries, Map and Geographic Information Center - MAGIC as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University of Connecticut Libraries, Map and Geographic Information Center - MAGIC in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the University of Connecticut Libraries, Map and Geographic Information Center - MAGIC as the source for this information. For example, include the following data source description when printing this layer on a map: Photo centers - From the Connecticut 1951-1952 Aerial Photography Center Point layer, published by the University of Connecticut Map and Geographic Information Center - MAGIC.

All attributes have valid values. Values are within defined domains. No rigid attribute accuracy tests were conducted.

Logical_Consistency_Report:

Point features conform to the following topological rules. Points are single part. There are no duplicate points. Points originating from the same layer [PROJECTCOD] do not overlap, however points originating from different and representing photographs at separate scales may overlap. Establishment of logical consistency was performed by the University of Connecticut Map and Geographic Information Center - MAGIC using USGS 1:24000 maps and visually comparing these maps to photo prints index in the University of Connecticut Map and Geographic Information Center - MAGIC collection to obtain the center points for these photographs. No automated procedures or tests were performed to guarantee desired topology other than visual inspection.

Completeness_Report:

The completeness of the data reflects the feature content of the data sources, which is photo center point layers by county for Aerial photography of Connecticut from 1951-1952 available online from the University of Connecticut Map and Geographic Information Center - MAGIC website.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: The horizontal positional accuracy of this data is unknown.

Shapefiles for CT Aerial photograph centerpoints were downloaded by county from the University of Connecticut Map and Geographic Information Center - MAGIC website, <http://magic.lib.uconn.edu/mash_up/aerial_index.html>. These layers were merged and exported as a single feature class.

Indirect_Spatial_Reference: State of Connecticut, United States of America

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 1858

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000000

Longitude_Resolution: 0.000000

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: apindex_37800_0000_1951_s20_wgs84

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: HOMER_ID

Attribute:

Attribute_Label: PROJECTCOD

Attribute:

Attribute_Label: COUNTY

Attribute:

Attribute_Label: COUNTYCODE

Attribute:

Attribute_Label: SCALE

Attribute:

Attribute_Label: AUTHOR

Attribute:

Attribute_Label: CHECKED

Attribute:

Attribute_Label: CREATED

Attribute:

Attribute_Label: BARCODE

Attribute:

Attribute_Label: TOWN

Attribute:

Attribute_Label: XUL_CORD

Attribute:

Attribute_Label: YUL_CORD

Attribute:

Attribute_Label: XLR_CORD

Attribute:

Attribute_Label: YLR_CORD

Attribute:

Attribute_Label: DATE_

Attribute:

Attribute_Label: MM_DD_YYYY

Attribute:

Attribute_Label: YEAR

Attribute:

Attribute_Label: Month

Attribute:

Attribute_Label: DAY

Attribute:

Attribute_Label: MONTH_TXT

Attribute:

Attribute_Label: PHOTO_QUAD

Attribute:

Attribute_Label: CNTY_SET

Attribute:

Attribute_Label: POINT_X

Attribute:

Attribute_Label: POINT_Y

Attribute:

Attribute_Label: XUL_COORD

Attribute:

Attribute_Label: YUL_COORD

Attribute:

Attribute_Label: XLR_COORD

Attribute:

Attribute_Label: YLR_COORD

Attribute:

Attribute_Label: JOIN

Attribute:

Attribute_Label: PDF

Attribute:

Attribute_Label: TIF

Overview_Description:

Entity_and_Attribute_Overview:

Information encoded about photo center points features includes identification information for Homer Babbage Library's bibliographic information [HOMER_ID], information regarding the date each photography represented by the center point feature in several formats including YYYYMMDD, MM/DD/YY, YYYY, MM, DD, and a text version of "Month" [DATE_], [MM_DD_YYYY], [YEAR], [Month], [DAY], and [MONTH_TXT] respectively, as well as the county code for each original set of photographs according to the University of Connecticut Map and Geographic Information Center's naming conventions [COUNTYCODE], photograph identification numbers and barcodes [IMAGE_ID] and [BARCODE], scale information [SCALE], the organization responsible for taking the photographs represented by each center point [AUTHOR], links online metatdata information and [METADATA], the initials of individuals responsible for creating and checking center point feature data [CREATED] and [CHECKED] respectively, the town into which each center point falls [TOWN], the name of each layer used to create this aerial photograph center point feature class [PROJECTCOD], the latitude and longitude coordinates of each center point [Lat] and [Long], the USGS 7.5 minute quadrangle within which each center point is located [PHOTO_QUAD], the bounding box coordinates, [XUL_COORD], [YUL_COORD], [XLR_COORD], and [YLR_COORD], and two fields necessary for pop-up functionality [FILE_NAME] and [DOWNLOAD].

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

University of Connecticut Map and Geographic Information Center - MAGIC

Contact_Address:

Address_Type: mailing address

Address: University of Connecticut Libraries

Address: Map and Geographic Information Center - MAGIC

Address: 369 Fairfield Road U-2005M

City: Storrs

State_or_Province: Connecticut

Postal_Code: 06269

Country: USA

Contact_Voice_Telephone: 860-486-4589

Contact_Electronic_Mail_Address: magic@uconn.edu

Hours_of_Service: Monday - Friday: 9am to 12pm, 1pm to 4pm

Contact_Instructions:

Summer and Break Hours
Monday - Friday: 1pm to 4pm

Resource_Description: Downloadable Data

Distribution_Liability:

MAGIC is charged with the distribution of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the tate. Although every effort has been made to ensure the accuracy of information errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. MAGIC endorses but does not support secondary distribution of this data.

The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.

Technical_Prerequisites:

Geographic information sytem (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.